Separator and purifier.



J. COX.

SEPARATOR AND PURIFIER. I

APPLICATION FILED DBO. 7, 1910.

O 3 A v 8 6' M Patented Nov. 28, 1911 2 SHEETSSHEET 1.

Ever 150.:-

J, 00x. SEPARATOR AND PURIPIER.

APPLICATION FILED DEO.191Q.

Patented Nov. 28, 1911.

2 SHEETS-SHEET 2.

Jfirz Coac M M @W JOHN COX, OF SAN FRANCISCO, CALIFORNIA.

SEPARATOR AND PURIFIER.

Application fi1ed December 7, 1910. Serial No. 596,059.

To all whom it may concern:

' Be it known that I, JOHN Cox, a citizen of the United States, residingin the city and county of San Francisco and State of California, haveinvented new and useful Improvements in Separators and Purifiers, ofwhich the following is a specification.

This invention relates to an apparatus for cleaning and purifying whitecarbonate of lead and particularly pertains to a machine for removingtan-bark and other foreign matter from, carbonates, preparatory togrinding.

It is the object of. this inventionto provide a simple and effectivemeans for separating and removing tan-bark and other materials oflighter specific gravity than carbonate of lead from the carbonatesprior to grinding.

In the process of corroding lead buckles in corroding bins and removingthem therefrom prior to separating the carbonates, considerabletan-bark, dirt and other foreign substances become mixed therewith,which it is necessary to remove before crushing and grinding thecarbonates, in order. to prevent discoloration of the product.Heretofore, this separating process has been done largely by hand whichrequires considerable time and labor, and is not' efficient because fineand dust-like particles of tanbark are not removed, and by reason of itscoloring character this dust causes a discoloration of the finishedproduct when ground therewith. The difficulty of entirely removing thetan-bark and other foreign matter necessitated considerable care inremoving the corroded lead buckles, but by the use of this inventionsuch care is not required as all dirt is completely removed thereby.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in which Figure l is a sideelevation of the invention. Fig. 2 isa partial plan view. Fig. 3

is a partial end elevation. Fig. 4 is adiagram illustrating the process.

In the embodiment of this invention I employ a series of slightlyinclined shaking A disposed one above'another with- "m a su tablehousing or casing 2. These screens A are suspended on links 3 which arepivoted at one end to the frame of the screens and at the other to theframe of the housing 2 in such manner that the screens A may beoscillated or vibrated in the directionof their length.

The vibrating of the screens A may be accomplished in any suitablemanner but they are here shown as actuated by eccentric disks 4 mountedon drive shafts 5 driven by any desired power. The eccentric disks 4operate straps 6 which are pivotally connected to the u per ends of thescreens A. The wire mesh 7 of the screens A is graduated in finenessfrom the uppermost to the lowermost screens A, the coarsest screendisposed at the top and the finest at the bottom, as is common ingrading machines employing vibrating screens.

A shaking table B may be disposed beneath the lower screen A upon whichthe fine particles delivered from the latter will be received andcarried forward to be discharged from the lower end of the table, aslater described.

The housing 2 is designed to completely Specification of Letters Patent.Patented Nov, 28 1911.

side of the end of the housing 2 and converge at their lower end in acommon point of discharge. These conveyer tubes 11 are connected at apoint near their lower end with a suction fan or other suitable meansfor creating a downward current of air in the tubes which is drawn inthrough the ori fices 10, the purpose of which will become apparenthereinafter.

Disposed above the outer projecting end of each screen A and table B,adjacent each slot 8, is a suction nozzle 12, having a long and narrowmouth or intake 12 which is situated in close proximity to the screen ortable surfaces, and extending the full width thereof.

The nozzle 12 is connected to a throat 13 leading to a verticallyarranged general or main suction pipe 14 disposed in front of thehousing 2. The suction pipe'14 is connected near its upper end to asuitable fan ward current of air through the nozzle 12 and throat 13.The lower end of thepipe' 14 terminates in a hopper 16 the bottom ofwhich is normally'closed by a slide plate 17.

A slide damper 15 is disposed in each throat 13 between the nozzle 12and the suction pipe 14, for the purpose of regulating the suction atthe intake 12' of the nozzle 12. The operation of this invention is asfollows: The white carbonates after being separated from the leadbuckles, are delivered to the uppermost screen A through a feed chute18. The finest particles'ofthe carbonate and other substances mingledtherewith, pass through the uppermost screen Aupon the screenthere-beneath and so on throughout the series; each screen A retainingsuch particles of carbonate and other materials as are too coarse topass between their respective meshes. The mat'erials supported upon thescreen surface are caused to move downward toward the lower end of thescreens by means of the sloping incline of the latter andthe vibrationmotion transmit-ted thereto by the eccentric disks 4. These particles ofcarbonates and other materials on passing through the slots 8 aresubjected to the action of the suction nozzle 12 which action is to drawor separate such material or particles of lesser specific gravity thanthe carbonates, and draw them into the main or general suction pipe 14.The suctional area of the suction pipe 14 being greater than the intakeof the nozzle 12, or the opening in the throat 13 and as governed by thedamper 15, causes the volume of-air drawn in through the nozzle 12 toexpand, thereby permitting or causing the heavier or larger particles ofthe materials therein to fall, downward into the hopper 16 from whencethey can be removed as desired, by opening the slide bottom 17.

, The purpose of the graduating screens A is to grade the dust particlesof tan-bark and other impurities that the suction of each nozzle 12 maybe so regulated by means of adamper 15 that thesuction will notaffectthe particles of white carbonates delivered or passed under theintake 12' of the nozzle.

For example; .if but one nozzle and a single shaking table were employeda draft at the nozzle 12 sufficiently strong to lift the large andcoarser particles of tan-bark and the like, would also carry away thefine and dust-like" particles of" the carbonates: but

by subjecting the carbonates and dust-like particles to a preliminarygrading process and subjecting each separate grade to a suction draft,which is regulated inproportion to the size and weight of the dirtparticles in that grade, it will be readily seen that nothing but thedirt particles will be drawn into the general suction pipe 14 other thanthe minutest particles of carbonates such as will be caused to rise andfloat in the air by the agitation of the screens A. The lower mostscreen A is provided with a screen mesh of approximately 100 meshes tothe square inch, so that the particles delivered upon the table B willbe extremely fine.

The lowermost nozzle 12 will be so adjusted by means of the damper 15that the fine dust and dirt particles of this grade will be separatedfrom the finest particles of carbonates. These graded carbonatesare'delivered tubes through the orifice. 1 0 and also pre-f vents thedust from rising in the conveyer tubes 11 and passing out the orifices10.

The poisonous nature of the carbonates makes it desirable that the dustbe prevented from floating in the air about the machine.

The dust particles drawn into the pipe 14 by the fan 18, Fig. 4, aredelivered to a separator 19 through a pipe 20, and the dust drawn fromthe conveyer tubes 11 by the auxiliary fan 21 is likewise delivered tothe separator 19- through the pipe 19'.

It is obvious that as many shakingscreens A and nozzles 12 may beemployed as may be found necessary in order to effect a thoroughcleaning of the carbonates.

In this description I have referred to lead buckles and in order thatthis may be fully understood I will state that in the method known ascasting the buckles the pig lead is melted in a large iron kettle and allowed to flow continuously on to an endless double belt of molds, whichform the lead into perforated disks of about one pound each, these disksbeing commonly known as buckles, due to the fanciful resemblance to thelarge metallic buckles used as ornaments on shoes in the earlier times.It is absolutely necessary that these buckles be cast, as a rollingprocess would harden or change the crystalline nature of the lead tosuch an extent that it would be impossible to corrode it.

Having thus described my invention, what I claim and desire to secure byLetters Patent-is" 1. In an apparatus for removing light foreignsubstances from heavier substances,

the combination with a series of vibrating superposed screens ofsuccess1vely-dimm1sh-- receiving trough mounted on the discharge end ofeach of said screens, a vertically disposed conveyer tube into which allof said troughs discharge, and means for creating a downward suction insaid conveyer tube.

2. An apparatus for removing tan bark and like substances from drycarbonate of lead, said apparatus including a series of superposedinclined screens of successively diminishing fineness, upwardly inclinednozzles with intakes disposed in close proximity above the lower ends ofthe screens, a suction apparatus and a vertical tank extending therefrominto which all the nozzles discharge, transversely disposed inclinedtroughs below the outer ends of the screens, conveyer tubes into whichsaid troughs discharge, and a suction device of less power than thefirst named one, with which said conveyer tubes connect.

3. An apparatus for removing tan bark and like substances from drycarbonate of lead, said apparatus including a series of superposedinclined screens of successively diminishing fineness,upwardly inclinednozzles with intakes disposed in close proximity above the lowerendsof-the screens, a suction apparatus and a vertical tank extendingtherefrom into whichall the nozzles discharge, transversely disposedinclined troughs-below the outer ends of the screens, conveyer tubesinto which said troughs discharge, a suction device of less power thanthe first named one, with which said conveyer tubes connect, and areceiver into which both suction devices discharge.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN COX.

Witnesses:

CHARLES EDELMAN,

C. C. CooK.

